Mobail_App/MainPage.xaml.cs

namespace MobailApp
{
    public partial class MainPage : ContentPage
    {
        //int count = 0;
        bool Pass = false;
        string Email = "";

        public MainPage()
        {
            InitializeComponent();
        }

        private async void Button_Clicked(object sender, EventArgs e)
        {
            await Navigation.PushAsync(new NewPage1());
        }

        private async void btnPassOpen_Clicked(object sender, EventArgs e)
        {
            if(Pass == false)
            {
                btnPassOpen.Text = "◎";
                etyPass.IsPassword = false;
                Pass = true;
            }
            else
            {
                btnPassOpen.Text = "◉";
                etyPass.IsPassword = true;
                Pass = false;
            }

            //await Navigation.PushAsync(new NewPage2());
        }

        //private void OnCounterClicked(object sender, EventArgs e)
        //{
        //    count++;

        //    if (count == 1)
        //        CounterBtn.Text = $"Clicked {count} time";
        //    else
        //        CounterBtn.Text = $"Clicked {count} times";

        //    SemanticScreenReader.Announce(CounterBtn.Text);
        //}

        //private async void NewPageOpenbtn_Clicked(System.Object sender, System.EventArgs e)
        //{
        //    await Navigation.PushAsync(new NewPage1());
        //}
    }

}